JPH03245366A - Still picture reproducing device - Google Patents

Abstract

PURPOSE:To reproduce recorded information even when an operator forgets a reproducing password by resetting reproducing inhibit information after the lapse of a prescribed period from reproducing time shown by reproducing time information while referring the reproducing time information of a control information memory area corresponding to a recorded picture. CONSTITUTION:The reproducing time information to show time for picture data to be finally read out from a picture data memory area 42, and a reproducing password 55 to permit the reproducing of this recorded picture are reloadably set, and when the reproducing password 55 is set, reproducing inhibit information 57 is simultaneously set to show inhibition for reproducing the recorded picture. When an input means instructs the reproducing of the recorded picture to set the reproducing inhibit information, while referring the reproducing time information of a control information memory area 40 corresponding to this recorded picture, this reproducing time information 57 is reset after the lapse of the prescribed period from the reproducing time shown by this reproducing time information at least. Thus, even when the operator forgets the password, the desired recorded picture can be reproduced.

Description

[Detailed Description of the Invention] The present invention provides an optical disc or a digital audio tape (D
The present invention relates to a still image reproducing device that reproduces a desired still image recorded in an image recording medium such as ATl in a predetermined format.

In this type of conventional still image recording and playback device, for still images recorded on an image recording medium such as an optical disk, a playback password is set as playback management information for recorded images that you do not want others to see during playback. By setting the password, the image cannot be played back by anyone who does not know the playback password.

On the other hand, if the person who set the playback password forgets the password, a situation may arise in which a desired recorded image cannot be played back.

Furthermore, there may be a case where a user initially sets a playback password to prevent others from playing the recorded image, but after a certain period of time has elapsed, the recorded image can be shown to others.

Purpose The present invention has been made in view of these circumstances,
A still image playback device is provided that can play back recorded images for which a playback password is set among a plurality of types of still images recorded on an image recording medium such as an optical disk even if an operator forgets the playback password. The purpose is to provide.

According to the present invention, in a still image reproducing device that reproduces a desired recorded image from an image recording medium on which recorded images of a plurality of screens are recorded, the image recording medium corresponds to each recorded image. It has a management information storage area in which management information related to the recorded image is stored, and an image data storage area in which image data of each recorded image is stored in units of one screen, and the management information storage area includes: Regarding the recorded image corresponding to this management information storage area, the playback information indicating the last time the image data was read from the image data record/pupil area and the playback password that allows playback of this recorded image can be rewritten. At the same time, when the playback password is set, playback prohibition information indicating prohibition of playback of the recorded image is set, and the playback device serves as an input means for inputting an instruction regarding playback of the image. , a recording means for recording management information in a management information storage area, an output means for outputting image data,
Reading management information and image data from the image recording medium in response to the input means, outputting the read image data to the output means according to the read management information, and controlling the recording means. and a control means, upon reproducing the recorded image instructed to be reproduced by the input means, the control means updates the reproduction time information in the management information storage area by the recording means, and sets the reproduction prohibition information by the input means. When the reproduction of a recorded image is instructed, the reproduction time information in the management information storage area corresponding to this recorded image is referred to, and if at least a predetermined period has elapsed from the reproduction time indicated by this reproduction time information, , which resets this reproduction prohibition information.

Further, according to the present invention, in a still image reproducing device that reproduces a desired recorded image from an image recording medium on which recorded images of a plurality of screens are recorded, the image recording medium has a plurality of images related to the recorded image corresponding to each recorded image. It has a management information storage area where management information is stored and an image data storage area where image data of each recorded image is stored in units of one screen. For the corresponding recorded image, playback information indicating when image data was last read out from the image data storage area and a playback password that permits playback of the recorded image are set to be rewritable;
The playback device includes an input means for inputting an instruction regarding playback of an image, a recording means for recording management information in a management information storage area, and an output means for outputting the image data and, when necessary, the management information to a monitor device. In response to the input means, management information and image data are read from the image recording medium, and if a playback password is set in advance in the management information record/pupil area, this playback password and the playback password input by the input means are The control means outputs the read image data and, if necessary, the management information to the output means only when they match, and controls the recording means, and the control means outputs the read image data and management information when necessary, and controls the recording means. When the image is played back, the recording means updates the playback information in the management information storage area, and when the input means instructs to play back the recorded image for which the playback password has been set,
With reference to playback information in the management information storage area corresponding to this recorded image, if at least a predetermined period of time has elapsed since the playback indicated by this playback information, this playback password is output to the output means. Accordingly, the information is displayed on the screen of the monitor device.

15 plates 11 Next, embodiments of the still image recording and reproducing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows the configuration of an embodiment of a still image recording device. In the figure, an image recording medium 12 is connected to a still image recording device 10 via a connector 14.

The image recording medium 12 is, for example, a digital audio tape in this embodiment, and image data in digital format is recorded on this image recording medium 12.

The still image recording device 10 includes an A/D converter 100, an encoding circuit 102, a frame memory 104, and an operation input section 1.
06 and a control circuit 108.

The A/D converter 100 converts the video signal input from the input terminal 16 into digital image data.

The encoding circuit 102 performs color separation and compression encoding of the image data output from the A/D converter 100.

The frame memory 104 stores one frame of image data output from the encoding circuit 102.

The operation input unit 106 is a means for manually issuing various recording instructions regarding image recording to the control circuit 108. Note that this instruction includes a pin number, pin code, etc. as a password.

The control circuit 108 controls the signal processing timing of the encoding circuit 102 and the storage timing in the frame memory 104.

As shown in FIG. 3, the image recording medium 12 includes a management information storage area fTOcl 40 in which management information regarding recording and playback of still images is stored, and image data of a plurality of types of still images in units of one screen, for example, n images. It has an image data storage area 42 in which only the image portion of is stored. The management information storage area fTOct 40 is provided with a storage area in which management information for each of the n image portions that can be recorded in the image data storage area 42 during image recording is stored. Management information for one screen is, for example, image number fINl 50 as shown in FIG.
, the start address (MA) where the image data is stored
151, date when the image data was first recorded fFR
152, date of last access for playback (L
AI 53, Title of the recorded image fTr154, Reproduction password required for reproduction of the recorded image fRPl 55, Number of accesses fAT to reproduce the image data) 56, Whether or not to prohibit reproduction of the recorded image The playback prohibition flag (fRF) 57 indicates whether or not writing of image data is prohibited, and the write prohibition flag (WF158) indicates whether or not writing of image data is prohibited.These data are stored as management information on a screen-by-screen basis. It is stored in the area fTOcl 40. Here, the reproduction prohibition flag (RFI 57) is the reproduction password (RP
)55 is set, but the playback prohibition flag fRF157 can be reset even if the playback password (RP155) is set.Also, the playback prohibition flag fRF157 can be reset when the playback password (RP155) is set. When playing back an image, if the playback password (fRP) and the playback prohibition flag (RFI) stored in advance in the management information storage area fTOc+ 40 match, the playback password (npl) and the playback password input match. It is now playable.

In such a configuration, when a video signal is input from the input terminal 16, this video signal is converted into digital format image data by the A/D converter 2 100.
The encoding circuit 1 is operated under the control of the control circuit 108 in response to a recording instruction inputted to the control circuit 108 from the operation input unit 106.
02 performs color separation and compression encoding of this image data. Furthermore, one frame of image data output from the encoding circuit 102 is stored in the frame memory 104.

Next, the address of the image data storage area 42 in which the image data of the still image to be recorded on the image recording medium 12 is stored is specified from the control circuit 108 via the address line 110 and the connector 14, and one Image data of a still image for a screen is stored in the image recording medium 12 from the frame memory 104.

Further, from the control circuit 108, an address line 110, a control line 11
2. The management information of the recorded image and the address data of the storage area where the management information is stored are sent to the image recording medium 12 via the connector 14, and are sent to a predetermined storage area of the management information storage area fTOcl 40 of the image recording medium 12. The management information of this recorded image is stored in . If the operator wishes to prohibit the reproduction of the recorded image by another person, the operator inputs, for example, a 4-digit password or password to the control circuit +0 as the reproduction password fRPl 55 from the operation input section 106.
8 is input. As a result, the playback password fRP15
5 is the address line 11O1 control line 11 from the control circuit 108
2 to the image recording medium I2, and the reproduction password fRPl 55 is stored in a predetermined storage area of the management information storage area (TOCI 40) in the image recording medium 12, as well as the management information storage area fTOc+40 in the image recording medium 12. A playback prohibition flag fR is stored in a predetermined storage area of
F) 57 is set.

A calendar is provided in the control circuit 108 and manages the current date and time of this device.The control circuit 108 obtains the current date and time from this calendar and records the recording date fFR).
52 records the recording date of the image data.

Next, FIG. 1 shows the configuration of an embodiment of a still image reproducing device. In the figure, the still image reproducing device 20 has a connector 1.
An image recording medium I2 is connected via 8.

The still image reproducing device 20 mainly uses a frame memory 200.
, a decoding circuit 202 , a D/A converter 204 , a signal processing circuit 206 , an operation input section 208 , a control circuit 21 ,
It is composed of 0.

The decoding circuit 202 is a circuit that decompresses and decodes compression-encoded image data for one frame read from the frame memory 202.

The signal processing circuit 206 converts the analog signal converted by the D/A converter 204 into a standard television signal such as an RGB signal or an NTSC signal.

The operation input unit 208 is a means for giving instructions regarding image reproduction to the control port Ill, 108 by manual operation. This instruction includes a password, a password, etc. as a playback password.

The control circuit 210 performs address designation in the image recording medium 12 and frame memory 2 when reading image data from the image recording medium 12 based on instructions from the operation input unit 208.
00, controls each circuit such as the decoding circuit 202, the D/A converter 204, and the signal processing circuit 206, and manages and calculates TOC information.

5. The control circuit 210 includes a CPU 212, an input/output interface 214, a RAM 216, and a ROM 21.5.
8 and a timer 220. timer 220
It has a calendaring function that measures time and generates the current date and time of this device.

In addition, the CPU 212 and the human output interface 214
, RAM 216 , and ROM 218 are connected to each other by a pass line 222 .

The signal processing circuit 206 of the still image reproduction device 20 is connected to the monitor device 30 via the connector 22.

In this configuration, when an instruction to reproduce a desired recorded image is input from the operation input unit 208 to the input/output interface 214 of the control circuit 210, first the image recording medium 1
The management information of the recorded image to be reproduced is read from the management information storage area fTOc) 2 of No. 2 to the RAM 21.6 via the input/output interface 214.

Next, the CPU 212 refers to the management information stored in the RAM 216 and determines whether the playback password (RP155) is stored in a predetermined storage area of the management information storage area (rTOc) 40 or whether the playback prohibition flag (RFI 57) is set. The CPU 212 determines that the reproduction password (RP) 55 is not stored in a predetermined storage area of the management information storage area fTOc+ 40 and that the reproduction prohibition flag fRFl 57 is not set. (: One frame of compression-encoded image data is read into the frame memory 200 under the control of the PU 212.

This image data is then decompressed and decoded by the decoding circuit 202, and converted into an analog signal by the D/A converter 204. This analog signal is converted into a predetermined standard television signal by the signal processing circuit 206, and a recorded image represented by this image signal is displayed on the screen of the monitor device 30.

On the other hand, regarding the recorded image that is the target of the reproduction instruction outputted from the operation input unit 208 to the input/output interface 214 of the control circuit 210, the input/output interface 214 is transmitted from the management information storage area 1TOc) 40 of the image recording medium 12. The playback password fRP of the recorded image among the management information read out to the RAM 216 via
l55 is stored, the playback password (password that matches RPj55 is input to the operation input section 20)
8 to the control circuit 210, the recorded image will not be reproduced on the monitor device 30.

On the other hand, if the CPU 212 refers to the management information read out to the RAM 216 and determines that the reproduction prohibition flag fRFl 57 is set for the recorded image, the recorded image is not reproduced on the monitor device 30. .

At this time, the CPU 212 refers to the date and time (fLA) 53 of the last access for playback among the management information read out to the RAM 216, and uses the date and time or date information output from the timer 220. Based on this, the elapsed time (elapsed period) from the last playback date fLA1 is calculated.

If this elapsed period exceeds a certain period (for example, one year), the CPU 212 generates a playback password (RP5).
5 is displayed on the display screen of the monitor device 30. The operator can reproduce the recorded image by inputting data of the reproduction password fRPl 55 from the operation input section 106.

Furthermore, if the elapsed period calculated above exceeds a certain period and the reproduction prohibition flag (RF) 57 is set, (:PU 212 sets the reproduction prohibition flag (RF
57, and the recorded image whose reproduction has been prohibited until now is displayed on the display screen of the monitor device 30.

Effects - As described above, the present invention provides a still image reproducing apparatus that records still images of multiple screens in a predetermined format on an image recording medium and reproduces a desired still image from this image recording medium. For recorded images that should not be reproduced, reproduction prohibition information that prohibits reproduction is set in the management information storage area where management information related to the recorded image is stored corresponding to each recorded image, and this reproduction prohibition is set. When a request is made to reproduce a specified recorded image, if a predetermined period of time has elapsed since the last reproduction request, the reproduction prohibition information is reset and the management information storage area of the image recording medium is Since the configuration is configured so that only the recorded images that are referenced and for which reproduction prohibition information is set are reproduced, recorded images that you do not want others to see among the multiple types of still images recorded on an image recording medium such as an optical disk. Even if a method is taken to prohibit image playback, the image can still be played back so that anyone can view it.

Further, in the present invention, for recorded images that are not to be reproduced by others, a reproduction password for restricting reproduction of the recorded images is stored in the management information storage area of the image recording medium based on instructions from the input means, and When a playback request is made for a recorded image for which a password has been set, if a predetermined period of time has elapsed since the last playback request, the playback password is displayed on the screen of the monitor device. Therefore, even if the person who registered the playback password forgets the playback password, the recorded image can be played back. Furthermore, if you set a playback password to prevent others from playing back the recorded images, but you do not mind showing the recorded images to others after a certain period of time, if you set 0, anyone can use the playback password. This allows you to view the image again.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a still image reproducing device to which the present invention is applied; FIG. 2 is a block diagram showing the configuration of an embodiment of a still image recording device to which the present invention is applied; FIG. 3 is an explanatory diagram showing an example of the recording format in the storage area of the image recording medium in FIGS. 1 and 2, and FIG. 4 is an explanatory diagram showing an example of the recording format in the storage area of the image recording medium in FIG. FIG. 2 is an explanatory diagram showing a configuration example. 104.200 LOG, 208 108.210 02 204. 06, frame memory operation input section control circuit, decoding circuit, D/A converter signal processing circuit

Claims (1)

[Scope of Claims] 1. In a still image reproducing device that reproduces a desired recorded image from an image recording medium on which recorded images of a plurality of screens are recorded, the image recording medium has a plurality of recorded images corresponding to each recorded image. has a management information storage area in which management information related to the management information is stored, and an image data storage area in which image data of each recorded image is stored in units of one screen, and the management information storage area includes the management information storage area. Regarding the recorded image corresponding to the area, reproduction time information indicating when image data was last read from the image data storage area and a reproduction password that allows reproduction of the recorded image are set to be rewritable, and When the playback password is set, playback prohibition information indicating prohibition of playback of the recorded image is set at the same time, and the playback device includes: an input means for inputting an instruction regarding playback of the image; and the management information storage. recording means for recording management information in a region; output means for outputting image data; reading management information and image data from the image recording medium in response to the input means; and reading the management information and image data according to the read management information. and control means for outputting the output image data to the output means and controlling the recording means, and the control means: when reproducing the recorded image instructed to be reproduced by the input means, the control means controls the recording means. updates the playback information in the management information storage area, and when the input means instructs to playback the recorded image in which the playback prohibition information is set, the playback information in the management information storage area corresponding to the recorded image is updated. 1. A still image reproducing device that refers to time information and resets the reproduction prohibition information when at least a predetermined period has elapsed from the reproduction time indicated by the reproduction time information. 2. In a still image reproducing device that reproduces a desired recorded image from an image recording medium on which recorded images of a plurality of screens are recorded, the image recording medium has management information related to the recorded image corresponding to each recorded image. It has a management information storage area where the image data of each recorded image is stored, and an image data storage area where the image data of each recorded image is stored in units of one screen, and the management information storage area includes the recorded image corresponding to the management information storage area. , playback time information indicating when image data was last read from the image data storage area and a playback password that allows playback of the recorded image are set to be rewritable, and the playback device is configured to: an input means for inputting instructions regarding the management information; a recording means for recording management information in the management information storage area; an output means for outputting image data and, if necessary, management information to a monitor device; Management information and image data are read from the image recording medium, and if a playback password is set in advance in the management information storage area, only when the playback password matches the playback password input by the input means. control means for outputting the read image data and, if necessary, management information to the output means and for controlling the recording means; When the playback password is set, the recording means updates the playback information in the management information storage area, and when the input means instructs the playback of the recorded image for which the playback password is set, the playback information corresponding to the recorded image is updated. With reference to the playback information in the management information storage area, if at least a predetermined period has elapsed since the playback indicated by the playback information, the playback password is output to the output means, thereby controlling the monitor device. A still image playback device characterized by displaying images on a screen.